How do I enable saving of filled-in fields on a PDF form?

Question

Some PDF forms can be saved, including all filled-in field data:

Some others can not be saved, and all filled-in field data are lost:

Answer 1

With the latest version of Adobe Reader, Adobe Reader XI, it seems that you can save the form.

From their webpage: Type your responses right on the PDF form, or click through and fill in the form fields. Then save and submit